package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@Slf4j
@RequestMapping("/user/dish")
@Api(tags = "C端用户菜品接口")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品信息
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品信息")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("C端分类id查询菜品：{}", categoryId);
        // 创建Redis的Key
        String key = "dish_" + categoryId;

        // 从Redis缓存里读取数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);

        // 若不为空
        if (list != null && !list.isEmpty()) {
            // 则从Redis查到信息直接返回
            return Result.success(list);
        }
        // 如果list为空, 则从MySQL中查询数据, 并缓存到Redis中
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE); // 查询起售菜品
        list = dishService.listWithFlavor(dish);
        redisTemplate.opsForValue().set(key, list);

        return Result.success(list);
    }
}
